<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<h3 style="width: 300px; height: 50px; line-height: 50px;">babel demo</h3>
<div class="box" style="width: 300px; height: 50px; line-height: 50px;">
  box
</div>
</body>
</html>
